package com.qf.servlet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class BseServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //设置编码格式
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        resp.setContentType("text/html;charset=UTF-8");

        //获取方法名称
        String mark = req.getParameter("mark");
        if (mark ==null || "".equals(mark)){
            throw  new RuntimeException("方法名不存在");
        }
        //获取class反射对象
        Class<? extends BseServlet> cla = this.getClass();
        try {
            Method method = cla.getMethod(mark, HttpServletRequest.class, HttpServletResponse.class);
            //调用方法执行
            method.invoke(this,req,resp);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException(e);
        }

    }
}
